Xkeyscore Source Code Exclusive |verified|
When Edward Snowden first revealed the existence of XKeyscore in 2013, the world learned that the National Security Agency (NSA) possessed a search engine capable of indexing almost everything a user does on the internet. But for years, the public only saw PowerPoint slides and top-secret manuals. The true technical mechanics of the system remained hidden until investigative journalists and researchers obtained and published segments of the actual XKeyscore source code and configuration files.
/* Quantum Insert: Override server response */ if (strstr(payload, "yahoo.com")) inject_payload(packet, malicious_js); recalculate_checksum(packet); forward_before_original();
# Conceptual execution flow of an XKEYSCORE HTTP Extractor def extract_http_attributes(packet_payload): attributes = {} # Parse HTTP request line if packet_payload.startswith(b"GET") or packet_payload.startswith(b"POST"): headers, body = parse_http_stream(packet_payload) # Isolate critical selectors attributes['user_agent'] = headers.get('User-Agent') attributes['host'] = headers.get('Host') attributes['cookie_values'] = extract_cookies(headers.get('Cookie')) attributes['referer'] = headers.get('Referer') if body: attributes['form_data'] = parse_post_body(body) return attributes Use code with caution. Selector Matching
Track connections to Tor directory servers, effectively creating a database of everyone attempting to access the dark web.
XKeyscore is not a single database but a piece of software running on a distributed network of over at approximately 150 field sites worldwide. The Intercepthttps://theintercept.com A Look at the Inner Workings of NSA's XKEYSCORE xkeyscore source code exclusive
Anomalous browsing habits, such as visiting a specific combination of websites within a designated time window. The Storage Problem and the Logic of Extraction
One line in analyst_api.c is particularly chilling:
A major technical revelation within the source code is how the NSA solves the problem of data gravity. Storing every petabyte of global internet traffic indefinitely is logistically impossible.
According to analyzed configurations, the system is designed to ingest "full take" data—meaning it captures not just metadata (who called whom), but the actual content of communications (what was said). When Edward Snowden first revealed the existence of
XKeyscore is the NSA’s widest-reaching system for querying unmined internet data. Unlike traditional targeted wiretaps, XKeyscore intercepts massive, rolling streams of international internet traffic from undersea fiber-optic cables, major satellites, and gateway routers.
XKeyscore specifically monitored Tor directory authorities located in Germany and other European nations, intercepting connections to map out the entire anonymity network. 2. The "Three-Day" Data Expiration Crisis
The code directly contradicted government claims that such tools only targeted serious foreign threats. It demonstrated that searching for privacy tools — a legitimate act for activists, journalists, and ordinary citizens in authoritarian regimes — could land an individual on an NSA watchlist.
The leaked configuration files show that XKEYSCORE can target users based on behavior rather than identity. Examples of coded rules include flag parameters for: /* Quantum Insert: Override server response */ if
Some of the key features of XKeyscore include:
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The analysis of the code, conducted by a team of experts, revealed deeply invasive capabilities that went far beyond what the public had been told [5†L6-L13]: